Characteristics of Electromagnetic Wave Absorption in Cylindrical Black Holes with Positive and Negative Refractive Indexes

The problem of plane electromagnetic wave scattering by cylindrical “black holes” with radial profile of dielectric permittivity and magnetic permability in the shell chosen in the form ε(ρ) = μ(ρ) ~ 1/ρ 2 and with constant permittivity and permeability in the central region is considered. The probl...

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Bibliographic Details
Published in:Optics and spectroscopy 2019-12, Vol.127 (6), p.1085-1092
Main Authors: Chizhevskaya, Ya. I., Skobelev, S. P.
Format: Article
Language:English
Subjects:
Absorption
Black holes
Blackbody
Cylinders
Cylindrical waves
Efficiency
Electromagnetic radiation
Finite element method
Lasers
Magnetic permeability
Mesostructures
Metamaterials
Optical Devices
Optics
Optics of Low-Dimensional Structures
Permeability
Permittivity
Photonics
Physics
Physics and Astronomy
Radar cross sections
Refractivity
Wave scattering
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Summary:The problem of plane electromagnetic wave scattering by cylindrical “black holes” with radial profile of dielectric permittivity and magnetic permability in the shell chosen in the form ε(ρ) = μ(ρ) ~ 1/ρ 2 and with constant permittivity and permeability in the central region is considered. The problem in rigorous formulation is solved both analytically for a basic model of the absorber and numerically using the one-dimensional method of finite elements for a modified model. The results obtained for absorption efficiency, radar cross-section, and field distribution in the cylinder are presented and discussed. It is shown that the absorption efficiency of the cylinder with negative refractive index at realistic values of parameters of the cylinder remains higher than the absorption efficiency of a similar cylinder with positive refractive index. However the indicated advantage is not so great as the advantage compared to the absorption efficiency of the black body predicted in the previous publications for the case of extremely low losses at the surface of the cylinder and extremely high magnitudes of negative permittivity and permeability and losses in the central region of radius approaching zero.
ISSN:0030-400X
1562-6911
DOI:10.1134/S0030400X19120063